Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Marianne Youssef, DMD

General Practice Dentistry in Scottsdale, AZ · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1780644500

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Registry record

Entity type Individual (Type 1)

Name Marianne Youssef

Credential DMD

Sex Female

Practice address Scottsdale, AZ, 85257

Phone (480) 882-4545

Fax (480) 882-5890

Enumeration date Mar 24, 2006

Last updated in NPPES Dec 19, 2022

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

122300000X Dentist Dental Providers · License D5889 (AZ) Secondary

122300000X Dentist Dental Providers · License D05889 (AZ) Secondary

1223G0001X General Practice Dentistry Dental Providers · License D05889 (AZ) Primary

DMD · Doctor of Medicine in Dentistry: A licensed dentist; DMD and DDS are equivalent dental degrees. About the DMD credential

Other identifiers

Identifier	Type	State	Issuer
796394	Medicaid	AZ	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Marianne Youssef?

Marianne Youssef is registered in NPPES with the primary taxonomy of General Practice Dentistry. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-12-19.